Quote:
Originally Posted by mirob
Strange how you don't see a product like that for x-amount of years (or really ever in a production vehicle) and then 3-4 manufacturers have a similar product within a couple of years of each other...I suppose BMW should be flattered...
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Emissions standards have become very strict recently... so that has something to do with it. Have reverse cylinder heads... where the exhaust sits on the inside of the "V" and the intakes are on the outside helps have a very short heat path from exhaust to turbo to cats. This is what helps makes a modern car run clean on cold starts - quickly.
I remember years ago(in the 90's) the EPA would bag a car's cold start cycle... it was called a "505" test... where they would measure a car's emissions for the first five minutes and five seconds. Not sure IF this is still done... but I am sure there are even more stricter standards for modern cars now a days.
Dackel